ST14F1MZQ Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The ST14F1MZQ is a panel-mount toggle switch manufactured by APEM Inc., featuring SPDT (Single Pole Double Throw) circuitry with On-Off-Mom switching function. Rated for 6A AC at 125V and 7A DC at 30V, this component is classified as obsolete. Due to its discontinued status, identifying functionally equivalent substitute parts is essential for design continuity, maintenance, and system upgrades where direct replacement is required.

Substiute Parts

ST14F1MZQ

APEM Inc.In Stock: 805ST14F1MZQ Datasheet

Current PartRFQ

M2019ES1W01

NKK SwitchesIn Stock: 818M2019ES1W01 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST14F1MZQ is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Circuit configuration must be SPDT
• Switch function must be On-Off-Mom
• AC current rating must be minimum 6A
• AC voltage rating must be minimum 125V
• DC voltage rating must be minimum 30V
• Mounting type must be Panel Mount
• Termination style must be Solder Lug
• Bushing thread must be 1/4-40
• Operating temperature range must encompass -30°C to 85°C

Identified Substitute: The M2019ES1W01 manufactured by NKK Switches meets all primary substitution criteria. While DC current rating differs (3A versus 7A), the AC electrical characteristics, voltage ratings, mechanical interface, and environmental specifications align with the ST14F1MZQ requirements.

Parameter Comparison

Engineering Selection Recommendations

The M2019ES1W01 serves as a functional equivalent for the obsolete ST14F1MZQ in applications where AC switching at 6A and 125V is the primary requirement. Both components maintain ROHS3 compliance and identical voltage specifications across AC and DC ratings.

Selection Considerations:

DC current applications exceeding 3A require evaluation of the application's actual DC load profile. If the circuit operates exclusively in AC mode or DC loads remain below 3A, the M2019ES1W01 provides direct substitution without electrical derating.

Panel cutout diameter variance (6.35mm versus 6.50mm) necessitates mechanical assessment. The 0.15mm difference may require minor panel modification or use of appropriate bushing adapters depending on panel tolerance specifications.

Electrical life rating reduction from 40,000 to 25,000 cycles should be factored into maintenance planning for high-cycle applications. Applications with cycle counts below 25,000 over the component's service life are unaffected by this parameter difference.

Both components are ROHS3 compliant and REACH unaffected, maintaining regulatory alignment for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the M2019ES1W01 directly replace the ST14F1MZQ in all applications?

A: Direct replacement is suitable for AC switching applications at 6A and 125V. DC applications must verify that load current does not exceed 3A. Panel cutout diameter difference (6.35mm versus 6.50mm) requires mechanical verification.

Q: What is the significance of the electrical life rating difference?

A: The ST14F1MZQ is rated for 40,000 cycles while the M2019ES1W01 is rated for 25,000 cycles. Applications with cumulative switch cycles below 25,000 over the component's operational life are not affected. High-cycle applications should account for this difference in maintenance scheduling.

Q: Are there compliance differences between these parts?

A: Both components are ROHS3 compliant and REACH unaffected. No regulatory compliance barriers exist for substitution.

Q: How does the panel cutout diameter difference affect installation?

A: The ST14F1MZQ requires a 6.35mm circular cutout while the M2019ES1W01 requires 6.50mm. Existing panels designed for the ST14F1MZQ may require enlargement of the cutout or use of a bushing adapter for the M2019ES1W01.

Q: What is the actuator length difference between these parts?

A: Actuator lengths are 11.43mm (ST14F1MZQ) and 11.40mm (M2019ES1W01), a difference of 0.03mm. This variance is negligible for standard panel-mount applications and does not affect functional compatibility.

Q: Why is the DC current rating lower on the substitute part?

A: The M2019ES1W01 is rated for 3A DC while the ST14F1MZQ is rated for 7A DC. Substitution is valid only when DC load current remains below 3A. AC applications are unaffected as both parts are rated for 6A AC.